Date
July 22, 2025, 5:13 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 31.035329] ================================================================== [ 31.035401] BUG: KASAN: double-free in kmem_cache_double_free+0x190/0x3c8 [ 31.035554] Free of addr fff00000c922c000 by task kunit_try_catch/240 [ 31.035597] [ 31.035642] CPU: 1 UID: 0 PID: 240 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc7-next-20250722 #1 PREEMPT [ 31.035757] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 31.035857] Hardware name: linux,dummy-virt (DT) [ 31.035906] Call trace: [ 31.035948] show_stack+0x20/0x38 (C) [ 31.036022] dump_stack_lvl+0x8c/0xd0 [ 31.036073] print_report+0x118/0x5e8 [ 31.036118] kasan_report_invalid_free+0xc0/0xe8 [ 31.036174] check_slab_allocation+0xd4/0x108 [ 31.036220] __kasan_slab_pre_free+0x2c/0x48 [ 31.036376] kmem_cache_free+0xf0/0x468 [ 31.036559] kmem_cache_double_free+0x190/0x3c8 [ 31.036676] kunit_try_run_case+0x170/0x3f0 [ 31.036728] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.036832] kthread+0x328/0x630 [ 31.036889] ret_from_fork+0x10/0x20 [ 31.036999] [ 31.037097] Allocated by task 240: [ 31.037180] kasan_save_stack+0x3c/0x68 [ 31.037222] kasan_save_track+0x20/0x40 [ 31.037256] kasan_save_alloc_info+0x40/0x58 [ 31.037303] __kasan_slab_alloc+0xa8/0xb0 [ 31.037337] kmem_cache_alloc_noprof+0x10c/0x398 [ 31.037378] kmem_cache_double_free+0x12c/0x3c8 [ 31.037416] kunit_try_run_case+0x170/0x3f0 [ 31.037452] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.037493] kthread+0x328/0x630 [ 31.037660] ret_from_fork+0x10/0x20 [ 31.037762] [ 31.037800] Freed by task 240: [ 31.037841] kasan_save_stack+0x3c/0x68 [ 31.037877] kasan_save_track+0x20/0x40 [ 31.037935] kasan_save_free_info+0x4c/0x78 [ 31.037971] __kasan_slab_free+0x6c/0x98 [ 31.038083] kmem_cache_free+0x260/0x468 [ 31.038253] kmem_cache_double_free+0x140/0x3c8 [ 31.038315] kunit_try_run_case+0x170/0x3f0 [ 31.038425] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 31.038610] kthread+0x328/0x630 [ 31.038720] ret_from_fork+0x10/0x20 [ 31.038776] [ 31.038795] The buggy address belongs to the object at fff00000c922c000 [ 31.038795] which belongs to the cache test_cache of size 200 [ 31.038972] The buggy address is located 0 bytes inside of [ 31.038972] 200-byte region [fff00000c922c000, fff00000c922c0c8) [ 31.039177] [ 31.039229] The buggy address belongs to the physical page: [ 31.039349] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10922c [ 31.039433] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 31.039585] page_type: f5(slab) [ 31.039663] raw: 0bfffe0000000000 fff00000c3f368c0 dead000000000122 0000000000000000 [ 31.039838] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 31.039891] page dumped because: kasan: bad access detected [ 31.039955] [ 31.039973] Memory state around the buggy address: [ 31.040007] fff00000c922bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.040324] fff00000c922bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.040489] >fff00000c922c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.040614] ^ [ 31.040705] fff00000c922c080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.040774] fff00000c922c100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.040920] ==================================================================
[ 25.787414] ================================================================== [ 25.787785] BUG: KASAN: double-free in kmem_cache_double_free+0x1e5/0x480 [ 25.788033] Free of addr ffff8881055f5000 by task kunit_try_catch/257 [ 25.788231] [ 25.788317] CPU: 1 UID: 0 PID: 257 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc7-next-20250722 #1 PREEMPT(voluntary) [ 25.788367] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.788379] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.788402] Call Trace: [ 25.788414] <TASK> [ 25.788431] dump_stack_lvl+0x73/0xb0 [ 25.788462] print_report+0xd1/0x640 [ 25.788484] ? __virt_addr_valid+0x1db/0x2d0 [ 25.788509] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.788534] ? kmem_cache_double_free+0x1e5/0x480 [ 25.788558] kasan_report_invalid_free+0x10a/0x130 [ 25.788582] ? kmem_cache_double_free+0x1e5/0x480 [ 25.788607] ? kmem_cache_double_free+0x1e5/0x480 [ 25.788631] check_slab_allocation+0x101/0x130 [ 25.788652] __kasan_slab_pre_free+0x28/0x40 [ 25.788672] kmem_cache_free+0xed/0x420 [ 25.788692] ? kmem_cache_alloc_noprof+0x123/0x3f0 [ 25.788716] ? kmem_cache_double_free+0x1e5/0x480 [ 25.788742] kmem_cache_double_free+0x1e5/0x480 [ 25.788766] ? __pfx_kmem_cache_double_free+0x10/0x10 [ 25.788789] ? finish_task_switch.isra.0+0x153/0x700 [ 25.788811] ? __switch_to+0x47/0xf80 [ 25.788863] ? __pfx_read_tsc+0x10/0x10 [ 25.788918] ? ktime_get_ts64+0x86/0x230 [ 25.788945] kunit_try_run_case+0x1a5/0x480 [ 25.788972] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.788994] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 25.789020] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 25.789045] ? __kthread_parkme+0x82/0x180 [ 25.789066] ? preempt_count_sub+0x50/0x80 [ 25.789089] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.789113] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.789137] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.789160] kthread+0x337/0x6f0 [ 25.789194] ? trace_preempt_on+0x20/0xc0 [ 25.789220] ? __pfx_kthread+0x10/0x10 [ 25.789274] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.789297] ? calculate_sigpending+0x7b/0xa0 [ 25.789321] ? __pfx_kthread+0x10/0x10 [ 25.789343] ret_from_fork+0x116/0x1d0 [ 25.789362] ? __pfx_kthread+0x10/0x10 [ 25.789382] ret_from_fork_asm+0x1a/0x30 [ 25.789413] </TASK> [ 25.789425] [ 25.805075] Allocated by task 257: [ 25.805263] kasan_save_stack+0x45/0x70 [ 25.805637] kasan_save_track+0x18/0x40 [ 25.806115] kasan_save_alloc_info+0x3b/0x50 [ 25.806589] __kasan_slab_alloc+0x91/0xa0 [ 25.807023] kmem_cache_alloc_noprof+0x123/0x3f0 [ 25.807362] kmem_cache_double_free+0x14f/0x480 [ 25.807792] kunit_try_run_case+0x1a5/0x480 [ 25.807996] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.808181] kthread+0x337/0x6f0 [ 25.808514] ret_from_fork+0x116/0x1d0 [ 25.808973] ret_from_fork_asm+0x1a/0x30 [ 25.809410] [ 25.809519] Freed by task 257: [ 25.809858] kasan_save_stack+0x45/0x70 [ 25.810177] kasan_save_track+0x18/0x40 [ 25.810398] kasan_save_free_info+0x3f/0x60 [ 25.810793] __kasan_slab_free+0x56/0x70 [ 25.811112] kmem_cache_free+0x249/0x420 [ 25.811265] kmem_cache_double_free+0x16a/0x480 [ 25.811792] kunit_try_run_case+0x1a5/0x480 [ 25.812120] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.812562] kthread+0x337/0x6f0 [ 25.812879] ret_from_fork+0x116/0x1d0 [ 25.813009] ret_from_fork_asm+0x1a/0x30 [ 25.813142] [ 25.813233] The buggy address belongs to the object at ffff8881055f5000 [ 25.813233] which belongs to the cache test_cache of size 200 [ 25.814414] The buggy address is located 0 bytes inside of [ 25.814414] 200-byte region [ffff8881055f5000, ffff8881055f50c8) [ 25.815181] [ 25.815254] The buggy address belongs to the physical page: [ 25.815821] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1055f5 [ 25.816202] flags: 0x200000000000000(node=0|zone=2) [ 25.816733] page_type: f5(slab) [ 25.816970] raw: 0200000000000000 ffff888101d72500 dead000000000122 0000000000000000 [ 25.817477] raw: 0000000000000000 00000000800f000f 00000000f5000000 0000000000000000 [ 25.818126] page dumped because: kasan: bad access detected [ 25.818333] [ 25.818471] Memory state around the buggy address: [ 25.818984] ffff8881055f4f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.819446] ffff8881055f4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.820141] >ffff8881055f5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.820877] ^ [ 25.821156] ffff8881055f5080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.821574] ffff8881055f5100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.822040] ==================================================================